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Carbon dioxide removal process

United States Patent

November 18, 2003
View the Complete Patent at the US Patent & Trademark Office
A process and apparatus for separating carbon dioxide from gas, especially natural gas, that also contains C.sub.3+ hydrocarbons. The invention uses two or three membrane separation steps, optionally in conjunction with cooling/condensation under pressure, to yield a lighter, sweeter product natural gas stream, and/or a carbon dioxide stream of reinjection quality and/or a natural gas liquids (NGL) stream.
Baker; Richard W. (Palo Alto, CA), Da Costa; Andre R. (Menlo Park, CA), Lokhandwala; Kaaeid A. (Fremont, CA)
Membrane Technology and Research, Inc. (Menlo Park, CA)
10/ 354,208
January 28, 2003
This invention was made in part with Government support under award number DE-FG03-97ER82429, awarded by the Department of Energy. The Government has certain rights in this invention.